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Title: Low emission U-fired boiler combustion system

Abstract

At least one main combustion chamber contains at least one pulverized coal burner. Each pulverized coal burner is operatively arranged for minimizing NO.sub.X production and for maintaining a predetermined operating temperature to liquefy ash within the combustion chamber. The combustion chamber includes a slag drain for removing slag from the combustion chamber. A slag screen is positioned in a generally U-shaped furnace flow pattern. The slag screen is positioned between the combustion chamber and a radiant furnace. The radiant furnace includes a reburning zone for in-furnace No.sub.X reduction. The reburning zone extends between a reburning fuel injection source and at least one overfire air injection port for injecting air.

Inventors:
 [1];  [2];  [3];  [4]
  1. North Brookfield, MA
  2. Worcester, MA
  3. Shrewsbury, MA
  4. Barre, MA
Issue Date:
Research Org.:
RILEY STOKER CORP
OSTI Identifier:
872985
Patent Number(s):
6058855
Assignee:
D. B. Riley, Inc. (Worcester, MA)
Patent Classifications (CPCs):
F - MECHANICAL ENGINEERING F23 - COMBUSTION APPARATUS F23C - METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  {A CARRIER GAS OR} AIR 
F - MECHANICAL ENGINEERING F23 - COMBUSTION APPARATUS F23D - BURNERS
DOE Contract Number:  
AC22-92PC92158
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
emission; u-fired; boiler; combustion; main; chamber; contains; pulverized; coal; burner; operatively; arranged; minimizing; production; maintaining; predetermined; operating; temperature; liquefy; ash; slag; drain; removing; screen; positioned; u-shaped; furnace; flow; pattern; radiant; reburning; zone; in-furnace; reduction; extends; fuel; injection; source; overfire; air; injecting; chamber contains; burning zone; pulverized coal; combustion chamber; operating temperature; fuel injection; main combustion; coal burner; flow pattern; injecting air; air injection; /110/

Citation Formats

Ake, Terence, Beittel, Roderick, Lisauskas, Robert A, and Reicker, Eric. Low emission U-fired boiler combustion system. United States: N. p., 2000. Web.
Ake, Terence, Beittel, Roderick, Lisauskas, Robert A, & Reicker, Eric. Low emission U-fired boiler combustion system. United States.
Ake, Terence, Beittel, Roderick, Lisauskas, Robert A, and Reicker, Eric. Sat . "Low emission U-fired boiler combustion system". United States. https://www.osti.gov/servlets/purl/872985.
@article{osti_872985,
title = {Low emission U-fired boiler combustion system},
author = {Ake, Terence and Beittel, Roderick and Lisauskas, Robert A and Reicker, Eric},
abstractNote = {At least one main combustion chamber contains at least one pulverized coal burner. Each pulverized coal burner is operatively arranged for minimizing NO.sub.X production and for maintaining a predetermined operating temperature to liquefy ash within the combustion chamber. The combustion chamber includes a slag drain for removing slag from the combustion chamber. A slag screen is positioned in a generally U-shaped furnace flow pattern. The slag screen is positioned between the combustion chamber and a radiant furnace. The radiant furnace includes a reburning zone for in-furnace No.sub.X reduction. The reburning zone extends between a reburning fuel injection source and at least one overfire air injection port for injecting air.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2000},
month = {1}
}

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